CN108390243A - A kind of high-order mode Brillouin optical fiber laser based on less fundamental mode optical fibre - Google Patents
A kind of high-order mode Brillouin optical fiber laser based on less fundamental mode optical fibre Download PDFInfo
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- CN108390243A CN108390243A CN201810348338.4A CN201810348338A CN108390243A CN 108390243 A CN108390243 A CN 108390243A CN 201810348338 A CN201810348338 A CN 201810348338A CN 108390243 A CN108390243 A CN 108390243A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06754—Fibre amplifiers
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/06766—C-band amplifiers, i.e. amplification in the range of about 1530 nm to 1560 nm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a kind of high-order mode Brillouin optical fiber laser based on less fundamental mode optical fibre, with ring cavity structure, including narrow linewidth pump laser, image intensifer, the first fiber mode selection coupler, the first Polarization Controller, optical fiber circulator, the second fiber mode selection coupler, the second Polarization Controller and less fundamental mode optical fibre；Wherein the first fiber mode selects coupler for chamber external schema switching device, and the M8003 line coupling of specific high-order mode in fundamental transverse mode and less fundamental mode optical fibre in single mode optical fiber may be implemented；Second fiber mode selects coupler for intracavity modal coupled apparatus, the M8003 line coupling of high-order mode in high-order mode and less fundamental mode optical fibre in less fundamental mode optical fibre may be implemented, Brillouin's non-linear gain based on less fundamental mode optical fibre in annular chamber, it realizes that higher order mode amplifies in the resonance of intracavitary, directly exports higher order mode laser.
Description
Technical field
The present invention relates to optical fiber laser, technical field of photo communication, more particularly to a kind of high-order mode based on less fundamental mode optical fibre
Brillouin optical fiber laser.
Background technology
High-order mode laser is with a wide range of applications, and draw due to its unique spatial-intensity, phase and polarisation distribution
The more and more interest of people are played.For example, in optical communication field, information is modulated in several different high-order modes, that is,
Pattern divides multiplexing technology, can significantly improve the transmission capacity in optic communication.In sensory field of optic fibre, high-order mode can reach more
High temperature and strain resolving accuracy.In addition, the vortex laser from high-order mode variation, in quantum and nanocomposite optical, optics
Manipulation, super-resolution imaging and laser material processing etc. have prodigious potentiality.
Under the promotion of these applications, researchers propose many methods to generate high-order mode laser.Currently, generating high
The laser of rank mould laser can substantially be divided into two classes：Volume elements part solid state laser and full-optical-fiber laser.Compared with the former, entirely
Optical fiber laser has many advantages, such as that at low cost, flexibility is good, stability is good, small, efficient.Realize full-optical-fiber laser
Critical component is efficient all -fiber pattern conversion or selector, including dislocation coupling technique, less fundamental mode optical fibre Prague light
Grid, long-period fiber grating and model selection coupler.The cloth of the conversion of these patterns or selector in full-optical-fiber laser
Office can be divided into two classes.The first kind, which is placed on the outside of resonant cavity, and grade is associated in the output of fundamental transverse mode (LP01) laser
In light path.Second class, the device are placed on the laser resonance intracavitary comprising single mode gain media.But strictly speaking, this two
Class laser is still the amplification of fundamental transverse mode resonance, rather than desired high-order mode resonance amplifies.In addition, because of the endless of device
Kind, both layouts also result in light beam power and quality degradation, and output high-order mode mode purity is low.Therefore, it realizes a kind of high
The method of efficiency, all -fiber and low cost has weight to obtain high-purity, high stability and compact-sized high-order mode laser
The meaning wanted.
Invention content
The shortcomings that it is an object of the invention to overcome the prior art and deficiency, provide a kind of high-order mode based on less fundamental mode optical fibre
Brillouin optical fiber laser realizes intracavitary high-order based on Brillouin's nonlinear effect using passive less fundamental mode optical fibre as gain media
Mould resonance amplifies, and the high-order mode laser of height mode purity is directly obtained in laser output.In addition, the laser also has knot
The advantages of aspects such as structure is compact, adjusting is easy, cheap, stability is high.
The purpose of the present invention is realized by the following technical solution：A kind of high-order mode Brillouin fiber optic based on less fundamental mode optical fibre
Laser, including：Narrow linewidth pump laser, image intensifer, the first fiber mode selection coupler, the first Polarization Controller,
Optical fiber circulator, the second fiber mode selection coupler, the second Polarization Controller and less fundamental mode optical fibre；
Wherein, the optical fiber circulator is the three fiber ports annular equipped with first port, second port and third port
Device；The narrow linewidth pump laser is connected to image intensifer；The image intensifer is connected to the first fiber mode selection coupling
The second port of the first port of clutch, the first fiber mode selection coupler is connected to optical fiber through the first Polarization Controller
The first port of circulator；The second port of the optical fiber circulator connects the first end of the second fiber mode selection coupler
Mouthful；The second port of the second fiber mode selection coupler is connected to fiber optic loop through the second Polarization Controller and less fundamental mode optical fibre
The third port of shape device is constituted annular chamber with this；The third port of the second fiber mode selection coupler exports laser.
Preferably, the narrow linewidth pump laser, the narrow linewidth semiconductor laser for selecting C-band power adjustable humorous
Or narrow cable and wide optical fiber laser, line width are less than 1MHz.
Preferably, the image intensifer selects high-gain erbium-doped fiber amplifier or 1550nm wave band semiconductor lights to put
Big device.
Preferably, first fiber mode selects coupler, is that single mode optical fiber is made with less fundamental mode optical fibre fused biconical taper
2 × 2 coupler, the M8003 line between specific higher order mode in the fundamental transverse mode and less fundamental mode optical fibre in single mode optical fiber may be implemented
Coupling, first and the 4th port be single mode optical fiber, second and third port be less fundamental mode optical fibre.
Preferably, the optical fiber circulator is less fundamental mode optical fibre circulator, and the tail optical fiber of three ports is less fundamental mode optical fibre.
Preferably, second fiber mode selects coupler, is that less fundamental mode optical fibre is made with less fundamental mode optical fibre fused biconical taper
2 × 2 coupler, the orientation in specific higher order mode and less fundamental mode optical fibre between specific higher order mode in less fundamental mode optical fibre may be implemented
The tail optical fiber of selection coupling, four ports is less fundamental mode optical fibre.
Preferably, the less fundamental mode optical fibre is 1550nm wave band less fundamental mode optical fibres, and the pattern count of support is more than 2 patterns, long
Degree is more than 20m.
The optical fiber laser of the present invention is ring cavity structure, includes an optical fiber circulator and an optical fiber mode in annular chamber
Formula selects coupler, and it is less fundamental mode optical fibre that optical fiber is connected in entire annular chamber.The present invention utilizes the excited Brillouin in less fundamental mode optical fibre
Scattering realizes that higher order mode amplifies in resonant cavity interior resonance, generates the high-order mode Brillouin laser for stablizing high-purity at room temperature.
Compared with prior art, the present invention having the following advantages that and advantageous effect：
1, the present invention selects coupler defeated as laser resonant cavity external schema switching device and laser using fiber mode
Go out coupled apparatus, loss is small, efficient.
2, the present invention is based on Brillouin's non-linear gain, realize that the amplification of higher order mode intracavitary resonance, the high-order mode of acquisition swash
Optical mode purity is high.
3, the present invention is using passive less fundamental mode optical fibre as gain media, and it is convenient to obtain, use easy to spread.
4, the present invention uses all optical fibre structure, simple in structure, at low cost, is easy to fibre system and integrates, and output laser is stablized
Good, the line width of property, improves the practicability and reliability of high-order mode laser.
Description of the drawings
Fig. 1 is the schematic diagram of high-order mode Brillouin optical fiber laser of the embodiment based on less fundamental mode optical fibre.
In figure：1- narrow linewidth pump lasers；2- image intensifers；The first fiber modes of 3- select coupler；4- first is inclined
Shake controller；5- optical fiber circulators；The second fiber modes of 6- select coupler；The second Polarization Controllers of 7-；8- less fundamental mode optical fibres.
Specific implementation mode
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Embodiment 1
As shown in Figure 1, a kind of high-order mode Brillouin optical fiber laser based on less fundamental mode optical fibre of this example, including narrow linewidth
Pump laser 1, image intensifer 2, the first fiber mode selection coupler 3, the first Polarization Controller 4, optical fiber circulator 5, the
Two fiber modes select coupler 6, the second Polarization Controller 7 and less fundamental mode optical fibre 8.
The laser that narrow linewidth pump laser 1 exports carries out power amplification, amplified high power pump light by amplifier 2
Inject the first fiber mode selection coupler 3 first port 301, through the first fiber mode select coupler 3 after, pump light by
The fundamental transverse mode of single mode optical fiber is changed into few mould in the second port 302 of the first fiber mode selection coupler 3 in first port 301
The specific high-order mode of optical fiber, the high-order mode pump light of generation reinject the first port 501 of optical fiber circulator 5, then from fiber optic loop
The second port 502 of shape device 5 injects the first port 601 of the second fiber mode selection coupler 6, that is, enters in less fundamental mode optical fibre 8.
When 2 amplified pumping light power of image intensifer is more than the Brillouin threshold of less fundamental mode optical fibre 8, it is excited cloth
In deep scattering effect, generate Brillouin's stokes light of inverted running.The Brillouin's stokes light generated in less fundamental mode optical fibre 8
The first port 601, the second port 502 of optical fiber circulator 5, fiber annular of coupler 6 are selected through the second fiber mode successively
The third port 503 of device 5 is again introduced into less fundamental mode optical fibre 8, and oscillation is formed in resonant cavity, that is, generating one compares pumping light frequency
Move down single order Brillouin's Stokes laser, this Brillouin's Stokes laser selects the of coupler 6 through the second fiber mode
Three ports 603 export.First fiber mode selects the first port 501 of the second port 302 and optical fiber circulator 5 of coupler 3
Between the first Polarization Controller 4 and 7 co- controlling pump light of the second Polarization Controller on less fundamental mode optical fibre 8 and Brillouin's pumping
The polarization state of light, to obtain maximum Brillouin's non-linear gain.
The first port 301 and the of narrow linewidth pump laser 1, image intensifer 2, the first fiber mode selection coupler 3
The tail optical fiber (connection optical fiber) of four ports 304 is common communications single mode optical fiber.Since the connection optical fiber in annular chamber is few
Mode fiber, and run with higher order mode, it is achieved that intracavitary higher order mode resonance amplifies, to be selected in the second fiber mode
The third port 603 of coupler 6 obtains the high-order mode laser of height mode purity.
Narrow linewidth pump laser, the narrow linewidth semiconductor laser that C-band power adjustable can be selected humorous or narrow linewidth
Optical fiber laser, line width are less than 1MHz.
Image intensifer can select high-gain erbium-doped fiber amplifier or 1550nm wave band semiconductor optical amplifiers.
First fiber mode selects coupler, is single mode optical fiber and made from less fundamental mode optical fibre fused biconical taper 2 × 2 coupling
The M8003 line coupling between specific higher order mode, the first He in the fundamental transverse mode and less fundamental mode optical fibre in single mode optical fiber may be implemented in device
4th port is single mode optical fiber, and second and third port are less fundamental mode optical fibre.
Optical fiber circulator is less fundamental mode optical fibre circulator, and the tail optical fiber of three ports is less fundamental mode optical fibre.
Second fiber mode selects coupler, is less fundamental mode optical fibre and made from less fundamental mode optical fibre fused biconical taper 2 × 2 coupling
Device, may be implemented the M8003 line coupling in specific higher order mode and less fundamental mode optical fibre between specific higher order mode in less fundamental mode optical fibre, and four
The tail optical fiber of a port is less fundamental mode optical fibre.
Less fundamental mode optical fibre is the 1550nm wave band less fundamental mode optical fibres of general commercial, and the pattern count of support is more than 2 patterns, and length is big
In 20m.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (7)
1. a kind of high-order mode Brillouin optical fiber laser based on less fundamental mode optical fibre, which is characterized in that including：Narrow linewidth pumping laser
Device, image intensifer, the first fiber mode selection coupler, the first Polarization Controller, optical fiber circulator, the selection of the second fiber mode
Coupler, the second Polarization Controller and less fundamental mode optical fibre；
Wherein, the optical fiber circulator is the three fiber port circulators equipped with first port, second port and third port；Institute
The narrow linewidth pump laser stated is connected to image intensifer；The image intensifer is connected to the first fiber mode selection coupler
The second port of first port, the first fiber mode selection coupler is connected to optical fiber circulator through the first Polarization Controller
First port；The second port of the optical fiber circulator connects the first port of the second fiber mode selection coupler；It is described
The second port of second fiber mode selection coupler is connected to optical fiber circulator through the second Polarization Controller and less fundamental mode optical fibre
Third port is constituted annular chamber with this；The third port of the second fiber mode selection coupler exports laser.
2. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
Narrow linewidth pump laser, select the humorous narrow linewidth semiconductor laser or narrow cable and wide optical fiber laser of C-band power adjustable,
Line width is less than 1MHz.
3. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
Image intensifer, select high-gain erbium-doped fiber amplifier or 1550nm wave band semiconductor optical amplifiers.
4. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
The first fiber mode select coupler, be made from single mode optical fiber and less fundamental mode optical fibre fused biconical taper 2 × 2 coupler, can be with
Realize the M8003 line coupling between specific higher order mode in the fundamental transverse mode and less fundamental mode optical fibre in single mode optical fiber, first and the 4th port
For single mode optical fiber, second and third port be less fundamental mode optical fibre.
5. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
Optical fiber circulator, be less fundamental mode optical fibre circulator, the tail optical fibers of three ports is less fundamental mode optical fibre.
6. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
The second fiber mode select coupler, be made from less fundamental mode optical fibre and less fundamental mode optical fibre fused biconical taper 2 × 2 coupler, can be with
Realize the M8003 line coupling in specific higher order mode and less fundamental mode optical fibre between specific higher order mode in less fundamental mode optical fibre, four ports
Tail optical fiber is less fundamental mode optical fibre.
7. the high-order mode Brillouin optical fiber laser according to claim 1 based on less fundamental mode optical fibre, which is characterized in that described
Less fundamental mode optical fibre be 1550nm wave band less fundamental mode optical fibres, the pattern count of support is more than 2 patterns, and length is more than 20m.
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| CN201810348338.4A CN108390243B (en) | 2018-04-18 | 2018-04-18 | High-order mode Brillouin fiber laser based on few-mode fiber |
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| CN201810348338.4A CN108390243B (en) | 2018-04-18 | 2018-04-18 | High-order mode Brillouin fiber laser based on few-mode fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308516A (en) * | 2019-07-30 | 2019-10-08 | 南京邮电大学 | A kind of mode conversion and application based on less fundamental mode optical fibre coupler |
| CN114721233A (en) * | 2022-06-09 | 2022-07-08 | 之江实验室 | Optical field generating device based on optical fiber device and single-wavelength super-resolution lithography system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308516A (en) * | 2019-07-30 | 2019-10-08 | 南京邮电大学 | A kind of mode conversion and application based on less fundamental mode optical fibre coupler |
| CN114721233A (en) * | 2022-06-09 | 2022-07-08 | 之江实验室 | Optical field generating device based on optical fiber device and single-wavelength super-resolution lithography system |
| CN114721233B (en) * | 2022-06-09 | 2023-03-07 | 之江实验室 | Optical field generating device based on optical fiber device and single-wavelength super-resolution lithography system |
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| CN108390243B (en) | 2023-08-22 |
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